/*
 * Copyright (C) 2012 Rothens
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package rpg.gfx;

/**
 * rothens.tarhely.biz
 * @author Rothens
 */
public class Bitmap {
	
	public final int width;
	public final int height;
	public final int[] pixels;
	
	public Bitmap(int width, int height) {
		this.width = width;
		this.height = height;
		pixels = new int[width * height];
	}
	
	public void draw(Bitmap bitmap, int xOffs, int yOffs) {
		for (int y = 0; y < bitmap.height; y++) {
			int yPix = y + yOffs;
			if (yPix < 0 || yPix >= height) {
				continue;
			}

			for (int x = 0; x < bitmap.width; x++) {
				int xPix = x + xOffs;
				if (xPix < 0 || xPix >= width) {
					continue;
				}
				int src = bitmap.pixels[x + y * bitmap.width];
				if(src != 0xff00ff && src != -65281)
					pixels[xPix + yPix * width] = src;
			}
		}
	}
	
	/**
	 * Rotates a Bitmap to the left. (Counter-clockwise)
	 */
	public Bitmap rotate(){
		Bitmap ret = new Bitmap(height, width);
		for(int i = 0; i < height * width; i++){
			int col = i % width;
			int row = i / width;
			ret.pixels[((width - col) * height) - ((height - row))] = pixels[i];
		}
		return ret;		
	}
	
}
